Control circuit and method of symmetrical power supply type six-phase position sensorless brushless motor
A symmetrical power supply, brushless motor technology, applied in the direction of speed/torque control of a single motor, can solve the problems of limited motor response performance and insufficient power supply stability, and achieve the effect of being conducive to accurate measurement and enhanced adaptability
Active Publication Date: 2016-01-13
XIAN MAGNETIC FOREST ELECTROMATIC
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Problems solved by technology
[0003] In order to solve technical problems such as limited motor response performance due to insufficient power supply stability in the background technology, the present invention provides a control method and circuit for a symmetrical power supply type six-phase position sensorless brushless motor
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[0037] Such as figure 1 , the control circuit of the six-phase position sensorless brushless motor with symmetrical power supply, including the controller, the armature drive circuit, the power supply of the armature drive circuit, the winding excitation pulse circuit, the power supply of the winding excitation pulse circuit, and the armature inductance voltage comparison circuit , The power supply of the armature inductance voltage comparison circuit;
[0038] The armature driving circuit is divided into six groups, and each group includes the upper driving circuit of the armature and the lower driving circuit of the armature; the power supply of the armature driving circuit includes the positive power supply of the upper driving circuit of the armature and the negative power supply of the lower driving circuit of the armature; The positive power supply of the upper drive circuit supplies power to the upper drive circuit of each group of armature, and the upper drive circuit ...
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The invention provides a control method and circuit of a symmetric power supply type six-phase non-position sensor brushless motor. The control method and circuit of the symmetric power supply type six-phase non-position sensor brushless motor solve the technical problem that a power supply in the background technology is unstable, so that the measuring precision of inductance is affected and controlling is not facilitated. A symmetric power supply is formed by sequentially connecting an armature upper drive circuit positive power supply with a current regulative diode 2DH1, a winding positive drive pulse circuit power supply, an armature inductance voltage comparison circuit positive power supply, an armature inductance voltage comparison circuit negative power supply, a winding negative drive pulse circuit power supply, a current regulative diode 2DH2 and an armature lower drive circuit negative power supply in series. The six sets of the power supplies are formed by connecting six voltage-stabilizing diodes and the two current regulative diodes in series. The utilization of the current regulative diodes facilitates stabilization of the voltages of all stabilizing tubes, the maximum current of a drive pulse of a winding which is not electrified can be the constant current of the current regulative diodes, and the inductance measurement of an armature is particularly facilitated.
Description
technical field [0001] The invention belongs to the field of electromechanical technology, and in particular relates to a control circuit and method of a symmetrical power supply type six-phase position sensorless brushless motor centered on the neutral point of the motor. Background technique [0002] In the prior art, the power supply of the armature drive circuit will be powered by the bootstrap circuit power supply, or even the battery power supply. In some special cases, such as long-term shutdown, gambling, load changes, etc., the lack of stability of the power supply will affect the Motor response performance, for another example, the non-energized winding excitation pulse circuit and the armature inductance voltage comparison circuit share the same power supply, the power supply stability is insufficient for the armature inductance voltage comparison circuit, which affects the measurement accuracy of the inductance, which improves the performance of the motor It will...
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IPC IPC(8): H02P6/08
Inventor 马玉林薛卫波赵军平李玉珊马泽希
Owner XIAN MAGNETIC FOREST ELECTROMATIC